10 
Table II. — Moisture content of guanos in the cave. 
Laboratory 
number. 
Moisture 
content. 
Laboratory 
number. 
Moisture 
content. 
497 
Per cent. 
43.12 
43.40 
29.36 
26.10 
25.00 
55. 92 
44.62 
504 
Per cent. 
8.47 
16.34 
17.96 
20.00 
12.22 
14.64 
498 
j 505 
499 
506 
500 
507 
501 
508 
502 
509 
503 
COMPLETE ANALYSES OF REPRESENTATIVE GUANOS. 
Before the systematic survey of the caves was commenced, a num- 
ber of samples were subjected to a complete analysis to gain an 
idea of their general composition and to find whether the amount 
of citrate-soluble phosphoric acid l varied with the quantity of any 
other constituents, as iron and alumina, lime, or sulphates. The 
analyses are given in Table III. 
The method of calculating the monetary value of the samples in 
Tables III and IV is described in a subsequent part of this report. 
1 Citrate-soluble phosphoric acid in this bulletin refers to all phosphoric acid soluble in neutral am- 
monium citrate, i. e., water-soluble phosphoric acid plus that insoluble in water but soluble in ammonium 
citrate. 
